src/Object/Image.php

   1 <?php
   2 /**
   3  * @file src/Object/Image.php
   4  * @brief This file contains the Image class for image processing
   5  */
   6 namespace Friendica\Object;
   7
   8 use Friendica\App;
   9 use Friendica\Core\Cache;
  10 use Friendica\Core\Config;
  11 use Friendica\Core\System;
  12 use Friendica\Database\DBM;
  13 use Friendica\Model\Photo;
  14 use Exception;
  15 use Imagick;
  16 use ImagickPixel;
  17
  18 require_once "include/photos.php";
  19
  20 /**
  21  * Class to handle images
  22  */
  23 class Image
  24 {
  25         private $image;
  26
  27         /*
  28          * Put back gd stuff, not everybody have Imagick
  29          */
  30         private $imagick;
  31         private $width;
  32         private $height;
  33         private $valid;
  34         private $type;
  35         private $types;
  36
  37         /**
  38          * @brief supported mimetypes and corresponding file extensions
  39          * @return array
  40          */
  41         public static function supportedTypes()
  42         {
  43                 if (class_exists('Imagick')) {
  44                         // Imagick::queryFormats won't help us a lot there...
  45                         // At least, not yet, other parts of friendica uses this array
  46                         $t = array(
  47                                 'image/jpeg' => 'jpg',
  48                                 'image/png' => 'png',
  49                                 'image/gif' => 'gif'
  50                         );
  51                 } else {
  52                         $t = array();
  53                         $t['image/jpeg'] ='jpg';
  54                         if (imagetypes() & IMG_PNG) {
  55                                 $t['image/png'] = 'png';
  56                         }
  57                 }
  58
  59                 return $t;
  60         }
  61
  62         /**
  63          * @brief Constructor
  64          * @param object  $data data
  65          * @param boolean $type optional, default null
  66          * @return object
  67          */
  68         public function __construct($data, $type = null)
  69         {
  70                 $this->imagick = class_exists('Imagick');
  71                 $this->types = static::supportedTypes();
  72                 if (!array_key_exists($type, $this->types)) {
  73                         $type='image/jpeg';
  74                 }
  75                 $this->type = $type;
  76
  77                 if ($this->isImagick() && $this->loadData($data)) {
  78                         return true;
  79                 } else {
  80                         // Failed to load with Imagick, fallback
  81                         $this->imagick = false;
  82                 }
  83                 return $this->loadData($data);
  84         }
  85
  86         /**
  87          * @brief Destructor
  88          * @return void
  89          */
  90         public function __destruct()
  91         {
  92                 if ($this->image) {
  93                         if ($this->isImagick()) {
  94                                 $this->image->clear();
  95                                 $this->image->destroy();
  96                                 return;
  97                         }
  98                         if (is_resource($this->image)) {
  99                                 imagedestroy($this->image);
 100                         }
 101                 }
 102         }
 103
 104         /**
 105          * @return boolean
 106          */
 107         public function isImagick()
 108         {
 109                 return $this->imagick;
 110         }
 111
 112         /**
 113          * @brief Maps Mime types to Imagick formats
 114          * @return arr With with image formats (mime type as key)
 115          */
 116         public static function getFormatsMap()
 117         {
 118                 $m = array(
 119                         'image/jpeg' => 'JPG',
 120                         'image/png' => 'PNG',
 121                         'image/gif' => 'GIF'
 122                 );
 123                 return $m;
 124         }
 125
 126         /**
 127          * @param object $data data
 128          * @return boolean
 129          */
 130         private function loadData($data)
 131         {
 132                 if ($this->isImagick()) {
 133                         $this->image = new Imagick();
 134                         try {
 135                                 $this->image->readImageBlob($data);
 136                         } catch (Exception $e) {
 137                                 // Imagick couldn't use the data
 138                                 return false;
 139                         }
 140
 141                         /*
 142                          * Setup the image to the format it will be saved to
 143                          */
 144                         $map = self::getFormatsMap();
 145                         $format = $map[$type];
 146                         $this->image->setFormat($format);
 147
 148                         // Always coalesce, if it is not a multi-frame image it won't hurt anyway
 149                         $this->image = $this->image->coalesceImages();
 150
 151                         /*
 152                          * setup the compression here, so we'll do it only once
 153                          */
 154                         switch ($this->getType()) {
 155                                 case "image/png":
 156                                         $quality = Config::get('system', 'png_quality');
 157                                         if ((! $quality) || ($quality > 9)) {
 158                                                 $quality = PNG_QUALITY;
 159                                         }
 160                                         /*
 161                                          * From http://www.imagemagick.org/script/command-line-options.php#quality:
 162                                          *
 163                                          * 'For the MNG and PNG image formats, the quality value sets
 164                                          * the zlib compression level (quality / 10) and filter-type (quality % 10).
 165                                          * The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
 166                                          * unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
 167                                          */
 168                                         $quality = $quality * 10;
 169                                         $this->image->setCompressionQuality($quality);
 170                                         break;
 171                                 case "image/jpeg":
 172                                         $quality = Config::get('system', 'jpeg_quality');
 173                                         if ((! $quality) || ($quality > 100)) {
 174                                                 $quality = JPEG_QUALITY;
 175                                         }
 176                                         $this->image->setCompressionQuality($quality);
 177                         }
 178
 179                         // The 'width' and 'height' properties are only used by non-Imagick routines.
 180                         $this->width  = $this->image->getImageWidth();
 181                         $this->height = $this->image->getImageHeight();
 182                         $this->valid  = true;
 183
 184                         return true;
 185                 }
 186
 187                 $this->valid = false;
 188                 $this->image = @imagecreatefromstring($data);
 189                 if ($this->image !== false) {
 190                         $this->width  = imagesx($this->image);
 191                         $this->height = imagesy($this->image);
 192                         $this->valid  = true;
 193                         imagealphablending($this->image, false);
 194                         imagesavealpha($this->image, true);
 195
 196                         return true;
 197                 }
 198
 199                 return false;
 200         }
 201
 202         /**
 203          * @return boolean
 204          */
 205         public function isValid()
 206         {
 207                 if ($this->isImagick()) {
 208                         return ($this->image !== false);
 209                 }
 210                 return $this->valid;
 211         }
 212
 213         /**
 214          * @return mixed
 215          */
 216         public function getWidth()
 217         {
 218                 if (!$this->isValid()) {
 219                         return false;
 220                 }
 221
 222                 if ($this->isImagick()) {
 223                         return $this->image->getImageWidth();
 224                 }
 225                 return $this->width;
 226         }
 227
 228         /**
 229          * @return mixed
 230          */
 231         public function getHeight()
 232         {
 233                 if (!$this->isValid()) {
 234                         return false;
 235                 }
 236
 237                 if ($this->isImagick()) {
 238                         return $this->image->getImageHeight();
 239                 }
 240                 return $this->height;
 241         }
 242
 243         /**
 244          * @return mixed
 245          */
 246         public function getImage()
 247         {
 248                 if (!$this->isValid()) {
 249                         return false;
 250                 }
 251
 252                 if ($this->isImagick()) {
 253                         /* Clean it */
 254                         $this->image = $this->image->deconstructImages();
 255                         return $this->image;
 256                 }
 257                 return $this->image;
 258         }
 259
 260         /**
 261          * @return mixed
 262          */
 263         public function getType()
 264         {
 265                 if (!$this->isValid()) {
 266                         return false;
 267                 }
 268
 269                 return $this->type;
 270         }
 271
 272         /**
 273          * @return mixed
 274          */
 275         public function getExt()
 276         {
 277                 if (!$this->isValid()) {
 278                         return false;
 279                 }
 280
 281                 return $this->types[$this->getType()];
 282         }
 283
 284         /**
 285          * @param integer $max max dimension
 286          * @return mixed
 287          */
 288         public function scaleDown($max)
 289         {
 290                 if (!$this->isValid()) {
 291                         return false;
 292                 }
 293
 294                 $width = $this->getWidth();
 295                 $height = $this->getHeight();
 296
 297                 $dest_width = $dest_height = 0;
 298
 299                 if ((! $width)|| (! $height)) {
 300                         return false;
 301                 }
 302
 303                 if ($width > $max && $height > $max) {
 304                         // very tall image (greater than 16:9)
 305                         // constrain the width - let the height float.
 306
 307                         if ((($height * 9) / 16) > $width) {
 308                                 $dest_width = $max;
 309                                 $dest_height = intval(($height * $max) / $width);
 310                         } elseif ($width > $height) {
 311                                 // else constrain both dimensions
 312                                 $dest_width = $max;
 313                                 $dest_height = intval(($height * $max) / $width);
 314                         } else {
 315                                 $dest_width = intval(($width * $max) / $height);
 316                                 $dest_height = $max;
 317                         }
 318                 } else {
 319                         if ($width > $max) {
 320                                 $dest_width = $max;
 321                                 $dest_height = intval(($height * $max) / $width);
 322                         } else {
 323                                 if ($height > $max) {
 324                                         // very tall image (greater than 16:9)
 325                                         // but width is OK - don't do anything
 326
 327                                         if ((($height * 9) / 16) > $width) {
 328                                                 $dest_width = $width;
 329                                                 $dest_height = $height;
 330                                         } else {
 331                                                 $dest_width = intval(($width * $max) / $height);
 332                                                 $dest_height = $max;
 333                                         }
 334                                 } else {
 335                                         $dest_width = $width;
 336                                         $dest_height = $height;
 337                                 }
 338                         }
 339                 }
 340
 341
 342                 if ($this->isImagick()) {
 343                         /*
 344                          * If it is not animated, there will be only one iteration here,
 345                          * so don't bother checking
 346                          */
 347                         // Don't forget to go back to the first frame
 348                         $this->image->setFirstIterator();
 349                         do {
 350                                 // FIXME - implement horizantal bias for scaling as in followin GD functions
 351                                 // to allow very tall images to be constrained only horizontally.
 352
 353                                 $this->image->scaleDown($dest_width, $dest_height);
 354                         } while ($this->image->nextImage());
 355
 356                         // These may not be necessary any more
 357                         $this->width  = $this->image->getImageWidth();
 358                         $this->height = $this->image->getImageHeight();
 359
 360                         return;
 361                 }
 362
 363
 364                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 365                 imagealphablending($dest, false);
 366                 imagesavealpha($dest, true);
 367                 if ($this->type=='image/png') {
 368                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 369                 }
 370                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 371                 if ($this->image) {
 372                         imagedestroy($this->image);
 373                 }
 374                 $this->image = $dest;
 375                 $this->width  = imagesx($this->image);
 376                 $this->height = imagesy($this->image);
 377         }
 378
 379         /**
 380          * @param integer $degrees degrees to rotate image
 381          * @return mixed
 382          */
 383         public function rotate($degrees)
 384         {
 385                 if (!$this->isValid()) {
 386                         return false;
 387                 }
 388
 389                 if ($this->isImagick()) {
 390                         $this->image->setFirstIterator();
 391                         do {
 392                                 $this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 393                         } while ($this->image->nextImage());
 394                         return;
 395                 }
 396
 397                 // if script dies at this point check memory_limit setting in php.ini
 398                 $this->image  = imagerotate($this->image, $degrees, 0);
 399                 $this->width  = imagesx($this->image);
 400                 $this->height = imagesy($this->image);
 401         }
 402
 403         /**
 404          * @param boolean $horiz optional, default true
 405          * @param boolean $vert  optional, default false
 406          * @return mixed
 407          */
 408         public function flip($horiz = true, $vert = false)
 409         {
 410                 if (!$this->isValid()) {
 411                         return false;
 412                 }
 413
 414                 if ($this->isImagick()) {
 415                         $this->image->setFirstIterator();
 416                         do {
 417                                 if ($horiz) {
 418                                         $this->image->flipImage();
 419                                 }
 420                                 if ($vert) {
 421                                         $this->image->flopImage();
 422                                 }
 423                         } while ($this->image->nextImage());
 424                         return;
 425                 }
 426
 427                 $w = imagesx($this->image);
 428                 $h = imagesy($this->image);
 429                 $flipped = imagecreate($w, $h);
 430                 if ($horiz) {
 431                         for ($x = 0; $x < $w; $x++) {
 432                                 imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
 433                         }
 434                 }
 435                 if ($vert) {
 436                         for ($y = 0; $y < $h; $y++) {
 437                                 imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
 438                         }
 439                 }
 440                 $this->image = $flipped;
 441         }
 442
 443         /**
 444          * @param string $filename filename
 445          * @return mixed
 446          */
 447         public function orient($filename)
 448         {
 449                 if ($this->isImagick()) {
 450                         // based off comment on http://php.net/manual/en/imagick.getimageorientation.php
 451                         $orientation = $this->image->getImageOrientation();
 452                         switch ($orientation) {
 453                                 case Imagick::ORIENTATION_BOTTOMRIGHT:
 454                                         $this->image->rotateimage("#000", 180);
 455                                         break;
 456                                 case Imagick::ORIENTATION_RIGHTTOP:
 457                                         $this->image->rotateimage("#000", 90);
 458                                         break;
 459                                 case Imagick::ORIENTATION_LEFTBOTTOM:
 460                                         $this->image->rotateimage("#000", -90);
 461                                         break;
 462                         }
 463
 464                         $this->image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
 465                         return true;
 466                 }
 467                 // based off comment on http://php.net/manual/en/function.imagerotate.php
 468
 469                 if (!$this->isValid()) {
 470                         return false;
 471                 }
 472
 473                 if ((!function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg')) {
 474                         return;
 475                 }
 476
 477                 $exif = @exif_read_data($filename, null, true);
 478                 if (!$exif) {
 479                         return;
 480                 }
 481
 482                 $ort = $exif['IFD0']['Orientation'];
 483
 484                 switch ($ort) {
 485                         case 1: // nothing
 486                                 break;
 487
 488                         case 2: // horizontal flip
 489                                 $this->flip();
 490                                 break;
 491
 492                         case 3: // 180 rotate left
 493                                 $this->rotate(180);
 494                                 break;
 495
 496                         case 4: // vertical flip
 497                                 $this->flip(false, true);
 498                                 break;
 499
 500                         case 5: // vertical flip + 90 rotate right
 501                                 $this->flip(false, true);
 502                                 $this->rotate(-90);
 503                                 break;
 504
 505                         case 6: // 90 rotate right
 506                                 $this->rotate(-90);
 507                                 break;
 508
 509                         case 7: // horizontal flip + 90 rotate right
 510                                 $this->flip();
 511                                 $this->rotate(-90);
 512                                 break;
 513
 514                         case 8: // 90 rotate left
 515                                 $this->rotate(90);
 516                                 break;
 517                 }
 518
 519                 //      logger('exif: ' . print_r($exif,true));
 520                 return $exif;
 521         }
 522
 523         /**
 524          * @param integer $min minimum dimension
 525          * @return mixed
 526          */
 527         public function scaleUp($min)
 528         {
 529                 if (!$this->isValid()) {
 530                         return false;
 531                 }
 532
 533                 $width = $this->getWidth();
 534                 $height = $this->getHeight();
 535
 536                 $dest_width = $dest_height = 0;
 537
 538                 if ((!$width)|| (!$height)) {
 539                         return false;
 540                 }
 541
 542                 if ($width < $min && $height < $min) {
 543                         if ($width > $height) {
 544                                 $dest_width = $min;
 545                                 $dest_height = intval(($height * $min) / $width);
 546                         } else {
 547                                 $dest_width = intval(($width * $min) / $height);
 548                                 $dest_height = $min;
 549                         }
 550                 } else {
 551                         if ($width < $min) {
 552                                 $dest_width = $min;
 553                                 $dest_height = intval(($height * $min) / $width);
 554                         } else {
 555                                 if ($height < $min) {
 556                                         $dest_width = intval(($width * $min) / $height);
 557                                         $dest_height = $min;
 558                                 } else {
 559                                         $dest_width = $width;
 560                                         $dest_height = $height;
 561                                 }
 562                         }
 563                 }
 564
 565                 if ($this->isImagick()) {
 566                         return $this->scaleDown($dest_width, $dest_height);
 567                 }
 568
 569                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 570                 imagealphablending($dest, false);
 571                 imagesavealpha($dest, true);
 572                 if ($this->type=='image/png') {
 573                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 574                 }
 575                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 576                 if ($this->image) {
 577                         imagedestroy($this->image);
 578                 }
 579                 $this->image = $dest;
 580                 $this->width  = imagesx($this->image);
 581                 $this->height = imagesy($this->image);
 582         }
 583
 584         /**
 585          * @param integer $dim dimension
 586          * @return mixed
 587          */
 588         public function scaleToSquare($dim)
 589         {
 590                 if (!$this->isValid()) {
 591                         return false;
 592                 }
 593
 594                 if ($this->isImagick()) {
 595                         $this->image->setFirstIterator();
 596                         do {
 597                                 $this->image->scaleDown($dim, $dim);
 598                         } while ($this->image->nextImage());
 599                         return;
 600                 }
 601
 602                 $dest = imagecreatetruecolor($dim, $dim);
 603                 imagealphablending($dest, false);
 604                 imagesavealpha($dest, true);
 605                 if ($this->type=='image/png') {
 606                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 607                 }
 608                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dim, $dim, $this->width, $this->height);
 609                 if ($this->image) {
 610                         imagedestroy($this->image);
 611                 }
 612                 $this->image = $dest;
 613                 $this->width  = imagesx($this->image);
 614                 $this->height = imagesy($this->image);
 615         }
 616
 617         /**
 618          * @param integer $max maximum
 619          * @param integer $x   x coordinate
 620          * @param integer $y   y coordinate
 621          * @param integer $w   width
 622          * @param integer $h   height
 623          * @return mixed
 624          */
 625         public function crop($max, $x, $y, $w, $h)
 626         {
 627                 if (!$this->isValid()) {
 628                         return false;
 629                 }
 630
 631                 if ($this->isImagick()) {
 632                         $this->image->setFirstIterator();
 633                         do {
 634                                 $this->image->cropImage($w, $h, $x, $y);
 635                                 /*
 636                                  * We need to remove the canva,
 637                                  * or the image is not resized to the crop:
 638                                  * http://php.net/manual/en/imagick.cropimage.php#97232
 639                                  */
 640                                 $this->image->setImagePage(0, 0, 0, 0);
 641                         } while ($this->image->nextImage());
 642                         return $this->scaleDown($max);
 643                 }
 644
 645                 $dest = imagecreatetruecolor($max, $max);
 646                 imagealphablending($dest, false);
 647                 imagesavealpha($dest, true);
 648                 if ($this->type=='image/png') {
 649                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 650                 }
 651                 imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
 652                 if ($this->image) {
 653                         imagedestroy($this->image);
 654                 }
 655                 $this->image = $dest;
 656                 $this->width  = imagesx($this->image);
 657                 $this->height = imagesy($this->image);
 658         }
 659
 660         /**
 661          * @param string $path file path
 662          * @return mixed
 663          */
 664         public function saveToFilePath($path)
 665         {
 666                 if (!$this->isValid()) {
 667                         return false;
 668                 }
 669
 670                 $string = $this->asString();
 671
 672                 $a = get_app();
 673
 674                 $stamp1 = microtime(true);
 675                 file_put_contents($path, $string);
 676                 $a->save_timestamp($stamp1, "file");
 677         }
 678
 679         /**
 680          * @brief Magic method allowing string casting of an Image object
 681          *
 682          * Ex: $data = $Image->asString();
 683          * can be replaced by
 684          * $data = (string) $Image;
 685          *
 686          * @return string
 687          */
 688         public function __toString() {
 689                 return $this->asString();
 690         }
 691
 692         /**
 693          * @return mixed
 694          */
 695         public function asString()
 696         {
 697                 if (!$this->isValid()) {
 698                         return false;
 699                 }
 700
 701                 if ($this->isImagick()) {
 702                         /* Clean it */
 703                         $this->image = $this->image->deconstructImages();
 704                         $string = $this->image->getImagesBlob();
 705                         return $string;
 706                 }
 707
 708                 $quality = false;
 709
 710                 ob_start();
 711
 712                 // Enable interlacing
 713                 imageinterlace($this->image, true);
 714
 715                 switch ($this->getType()) {
 716                         case "image/png":
 717                                 $quality = Config::get('system', 'png_quality');
 718                                 if ((!$quality) || ($quality > 9)) {
 719                                         $quality = PNG_QUALITY;
 720                                 }
 721                                 imagepng($this->image, null, $quality);
 722                                 break;
 723                         case "image/jpeg":
 724                                 $quality = Config::get('system', 'jpeg_quality');
 725                                 if ((!$quality) || ($quality > 100)) {
 726                                         $quality = JPEG_QUALITY;
 727                                 }
 728                                 imagejpeg($this->image, null, $quality);
 729                 }
 730                 $string = ob_get_contents();
 731                 ob_end_clean();
 732
 733                 return $string;
 734         }
 735
 736         /**
 737          * Guess image mimetype from filename or from Content-Type header
 738          *
 739          * @param string  $filename Image filename
 740          * @param boolean $fromcurl Check Content-Type header from curl request
 741          *
 742          * @return object
 743          */
 744         public static function guessType($filename, $fromcurl = false)
 745         {
 746                 logger('Image: guessType: '.$filename . ($fromcurl?' from curl headers':''), LOGGER_DEBUG);
 747                 $type = null;
 748                 if ($fromcurl) {
 749                         $a = get_app();
 750                         $headers=array();
 751                         $h = explode("\n", $a->get_curl_headers());
 752                         foreach ($h as $l) {
 753                                 list($k,$v) = array_map("trim", explode(":", trim($l), 2));
 754                                 $headers[$k] = $v;
 755                         }
 756                         if (array_key_exists('Content-Type', $headers))
 757                                 $type = $headers['Content-Type'];
 758                 }
 759                 if (is_null($type)) {
 760                         // Guessing from extension? Isn't that... dangerous?
 761                         if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
 762                                 /**
 763                                  * Well, this not much better,
 764                                  * but at least it comes from the data inside the image,
 765                                  * we won't be tricked by a manipulated extension
 766                                  */
 767                                 $image = new Imagick($filename);
 768                                 $type = $image->getImageMimeType();
 769                                 $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
 770                         } else {
 771                                 $ext = pathinfo($filename, PATHINFO_EXTENSION);
 772                                 $types = self::supportedTypes();
 773                                 $type = "image/jpeg";
 774                                 foreach ($types as $m => $e) {
 775                                         if ($ext == $e) {
 776                                                 $type = $m;
 777                                         }
 778                                 }
 779                         }
 780                 }
 781                 logger('Image: guessType: type='.$type, LOGGER_DEBUG);
 782                 return $type;
 783         }
 784
 785         /**
 786          * @param string $url url
 787          * @return object
 788          */
 789         public static function getInfoFromURL($url)
 790         {
 791                 $data = array();
 792
 793                 $data = Cache::get($url);
 794
 795                 if (is_null($data) || !$data || !is_array($data)) {
 796                         $img_str = fetch_url($url, true, $redirects, 4);
 797                         $filesize = strlen($img_str);
 798
 799                         if (function_exists("getimagesizefromstring")) {
 800                                 $data = getimagesizefromstring($img_str);
 801                         } else {
 802                                 $tempfile = tempnam(get_temppath(), "cache");
 803
 804                                 $a = get_app();
 805                                 $stamp1 = microtime(true);
 806                                 file_put_contents($tempfile, $img_str);
 807                                 $a->save_timestamp($stamp1, "file");
 808
 809                                 $data = getimagesize($tempfile);
 810                                 unlink($tempfile);
 811                         }
 812
 813                         if ($data) {
 814                                 $data["size"] = $filesize;
 815                         }
 816
 817                         Cache::set($url, $data);
 818                 }
 819
 820                 return $data;
 821         }
 822
 823         /**
 824          * @param integer $width  width
 825          * @param integer $height height
 826          * @param integer $max    max
 827          * @return array
 828          */
 829         public static function getScalingDimensions($width, $height, $max)
 830         {
 831                 $dest_width = $dest_height = 0;
 832
 833                 if ((!$width) || (!$height)) {
 834                         return false;
 835                 }
 836
 837                 if ($width > $max && $height > $max) {
 838                         // very tall image (greater than 16:9)
 839                         // constrain the width - let the height float.
 840
 841                         if ((($height * 9) / 16) > $width) {
 842                                 $dest_width = $max;
 843                                 $dest_height = intval(($height * $max) / $width);
 844                         } elseif ($width > $height) {
 845                                 // else constrain both dimensions
 846                                 $dest_width = $max;
 847                                 $dest_height = intval(($height * $max) / $width);
 848                         } else {
 849                                 $dest_width = intval(($width * $max) / $height);
 850                                 $dest_height = $max;
 851                         }
 852                 } else {
 853                         if ($width > $max) {
 854                                 $dest_width = $max;
 855                                 $dest_height = intval(($height * $max) / $width);
 856                         } else {
 857                                 if ($height > $max) {
 858                                         // very tall image (greater than 16:9)
 859                                         // but width is OK - don't do anything
 860
 861                                         if ((($height * 9) / 16) > $width) {
 862                                                 $dest_width = $width;
 863                                                 $dest_height = $height;
 864                                         } else {
 865                                                 $dest_width = intval(($width * $max) / $height);
 866                                                 $dest_height = $max;
 867                                         }
 868                                 } else {
 869                                         $dest_width = $width;
 870                                         $dest_height = $height;
 871                                 }
 872                         }
 873                 }
 874                 return array("width" => $dest_width, "height" => $dest_height);
 875         }
 876
 877         /**
 878          * @brief This function is used by the fromgplus addon
 879          * @param object  $a         App
 880          * @param integer $uid       user id
 881          * @param string  $imagedata optional, default empty
 882          * @param string  $url       optional, default empty
 883          * @return array
 884          */
 885         public static function storePhoto(App $a, $uid, $imagedata = "", $url = "")
 886         {
 887                 $r = q(
 888                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
 889                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
 890                         intval($uid)
 891                 );
 892
 893                 if (!DBM::is_result($r)) {
 894                         logger("Can't detect user data for uid ".$uid, LOGGER_DEBUG);
 895                         return(array());
 896                 }
 897
 898                 $page_owner_nick  = $r[0]['nickname'];
 899
 900                 /// @TODO
 901                 /// $default_cid      = $r[0]['id'];
 902                 /// $community_page   = (($r[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
 903
 904                 if ((strlen($imagedata) == 0) && ($url == "")) {
 905                         logger("No image data and no url provided", LOGGER_DEBUG);
 906                         return(array());
 907                 } elseif (strlen($imagedata) == 0) {
 908                         logger("Uploading picture from ".$url, LOGGER_DEBUG);
 909
 910                         $stamp1 = microtime(true);
 911                         $imagedata = @file_get_contents($url);
 912                         $a->save_timestamp($stamp1, "file");
 913                 }
 914
 915                 $maximagesize = Config::get('system', 'maximagesize');
 916
 917                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
 918                         logger("Image exceeds size limit of ".$maximagesize, LOGGER_DEBUG);
 919                         return(array());
 920                 }
 921
 922                 $tempfile = tempnam(get_temppath(), "cache");
 923
 924                 $stamp1 = microtime(true);
 925                 file_put_contents($tempfile, $imagedata);
 926                 $a->save_timestamp($stamp1, "file");
 927
 928                 $data = getimagesize($tempfile);
 929
 930                 if (!isset($data["mime"])) {
 931                         unlink($tempfile);
 932                         logger("File is no picture", LOGGER_DEBUG);
 933                         return(array());
 934                 }
 935
 936                 $Image = new Image($imagedata, $data["mime"]);
 937
 938                 if (!$Image->isValid()) {
 939                         unlink($tempfile);
 940                         logger("Picture is no valid picture", LOGGER_DEBUG);
 941                         return(array());
 942                 }
 943
 944                 $Image->orient($tempfile);
 945                 unlink($tempfile);
 946
 947                 $max_length = Config::get('system', 'max_image_length');
 948                 if (! $max_length) {
 949                         $max_length = MAX_IMAGE_LENGTH;
 950                 }
 951
 952                 if ($max_length > 0) {
 953                         $Image->scaleDown($max_length);
 954                 }
 955
 956                 $width = $Image->getWidth();
 957                 $height = $Image->getHeight();
 958
 959                 $hash = photo_new_resource();
 960
 961                 $smallest = 0;
 962
 963                 // Pictures are always public by now
 964                 //$defperm = '<'.$default_cid.'>';
 965                 $defperm = "";
 966                 $visitor = 0;
 967
 968                 $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, t('Wall Photos'), 0, 0, $defperm);
 969
 970                 if (!$r) {
 971                         logger("Picture couldn't be stored", LOGGER_DEBUG);
 972                         return(array());
 973                 }
 974
 975                 $image = array("page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
 976                         "full" => System::baseUrl()."/photo/{$hash}-0.".$Image->getExt());
 977
 978                 if ($width > 800 || $height > 800) {
 979                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$Image->getExt();
 980                 }
 981
 982                 if ($width > 640 || $height > 640) {
 983                         $Image->scaleDown(640);
 984                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, t('Wall Photos'), 1, 0, $defperm);
 985                         if ($r) {
 986                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$Image->getExt();
 987                         }
 988                 }
 989
 990                 if ($width > 320 || $height > 320) {
 991                         $Image->scaleDown(320);
 992                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, t('Wall Photos'), 2, 0, $defperm);
 993                         if ($r) {
 994                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$Image->getExt();
 995                         }
 996                 }
 997
 998                 if ($width > 160 && $height > 160) {
 999                         $x = 0;
1000                         $y = 0;
1001
1002                         $min = $Image->getWidth();
1003                         if ($min > 160) {
1004                                 $x = ($min - 160) / 2;
1005                         }
1006
1007                         if ($Image->getHeight() < $min) {
1008                                 $min = $Image->getHeight();
1009                                 if ($min > 160) {
1010                                         $y = ($min - 160) / 2;
1011                                 }
1012                         }
1013
1014                         $min = 160;
1015                         $Image->crop(160, $x, $y, $min, $min);
1016
1017                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, t('Wall Photos'), 3, 0, $defperm);
1018                         if ($r) {
1019                                 $image["thumb"] = System::baseUrl()."/photo/{$hash}-3.".$Image->getExt();
1020                         }
1021                 }
1022
1023                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
1024                 $image["preview"] = $image["full"];
1025
1026                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
1027                 //if (isset($image["thumb"]))
1028                 //  $image["preview"] = $image["thumb"];
1029
1030                 // Unsure, if this should be activated or deactivated
1031                 //if (isset($image["small"]))
1032                 //  $image["preview"] = $image["small"];
1033
1034                 if (isset($image["medium"])) {
1035                         $image["preview"] = $image["medium"];
1036                 }
1037
1038                 return($image);
1039         }
1040 }